Acoustic damping part, method for producing a sound-insulated vehicle body and motor vehicle

Abstract

An acoustic damping part for arrangement in a motor vehicle, a method for producing a sound-insulated vehicle body, and a motor vehicle, in particular a passenger car is provided. The acoustic damping part comprises a sound insulation element, in particular a foam element, for substantially planar contact with at least one portion of a motor vehicle body, in particular an end wall, in order to reduce the transmission of sound into a passenger compartment. Furthermore, the acoustic damping part has at least one plug part connected to the sound insulation element with a plug for insertion into an opening of a vehicle body component or component composite. This serves to produce a non-positive and/or positive connection of the acoustic damping part with material of the vehicle body component or component composite that forms the opening.

Claims

1. An acoustic damping part for arrangement in a motor vehicle, the acoustic damping part comprising: a sound insulation element having a first side for substantially planar contact with at least one area of a motor vehicle body to reduce a transmission of sound into a passenger compartment; at least one plug part connected to the sound insulation element; wherein the at least one plug part includes a plug protruding from a first side thereof, the plug adapted to be inserted into an opening of a vehicle body component or a component composite to provide a non-positive and/or a positive connection of the acoustic damping part with a material of the vehicle body component or component composite forming the opening, and wherein the sound insulation element and the at least one plug part are hinged together via a living hinge.

2. The acoustic damping part according to claim 1, wherein the plug forms an undercut with the material forming the opening so that a positive connection of the acoustic damping part with the material forming the opening is produced such that a translational degree of freedom of the plug is blocked against an insertion direction.

3. The acoustic damping part according to claim 1, wherein at least a first extension of the plug substantially perpendicular to an insertion direction is greater than a second extension of the plug along the insertion direction so that the plug is configured to seal the opening.

4. The acoustic damping part according to claim 1, wherein a second side of the sound insulation element that is opposite to the first side and/or a second side of the at least one plug part that is opposite to first side having the plug, is covered, at least in some areas, with a heavy layer.

5. The acoustic damping part according to claim 4, wherein the heavy layer connects the sound insulation element and the at least one plug part with one another.

6. The acoustic damping part according to claim 1, wherein the sound insulation element and the at least one plug part comprising the plug are integrally formed.

7. A method for producing a sound-insulated vehicle body, the method comprising: providing the acoustic damping part according to claim 1; providing at least one part of a motor vehicle body with the vehicle body component or component composite forming the opening; and inserting the plug into the opening so that the non-positive and/or positive connection of the acoustic damping part is created with the material of the vehicle body component or component composite forming the opening.

8. The method for producing a sound-insulated vehicle body according to claim 7, wherein, before inserting the plug, the first side of the sound insulation element of the acoustic damping part is brought into abutment substantially flat against at least a portion of the motor vehicle body or at least a region of an end wall.

9. A motor vehicle or a passenger car comprising at least one acoustic damping part according to claim 1, wherein the at least one plug part is inserted in the opening of a motor vehicle body component or component composite.

10. The acoustic damping part according to claim 1, wherein the sound insulation element is a foam element.

11. The acoustic damping part according to claim 1, wherein the at least one area of the motor vehicle body is an end wall.

12. The acoustic damping part according to claim 1, wherein the sound insulation element and the at least one plug part are connected together by the living hinge, and wherein a heavy layer is provided at the living hinge.

13. The acoustic damping part according to claim 12, wherein the heavy layer covers at least a portion of the sound insulation element and at least a portion of the at least one plug part and wherein the heavy layer extends beyond an outer periphery of the portion of the at least one plug part to bear directly against the vehicle body component or the component composite.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

(2) FIG. 1 is a perspective view of a system for acoustic damping known from the prior art,

(3) FIG. 2 is a perspective view of the acoustic damping part according to an exemplary embodiment of the invention,

(4) FIG. 3 is a perspective detailed view of the acoustic damping part from FIG. 2,

(5) FIG. 4 is a perspective view of an area of a sound-insulated vehicle body according to the invention,

(6) FIG. 5 is a sectional drawing A-A of the acoustic damping part from FIG. 4, and

(7) FIG. 6 is a sectional drawing B-B of the acoustic damping part from FIG. 4.

DETAILED DESCRIPTION

(8) FIG. 1 has already been discussed for purposes of explaining the prior art.

(9) FIG. 2 shows the acoustic damping part 10 according to the invention in a motor vehicle. Shown is a view looking in the direction substantially along the direction of travel of a motor vehicle comprising the acoustic damping part 10. The acoustic damping part 10 comprises a sound insulation element 15 for surface contact with an end wall of a motor vehicle. During normal use of the acoustic damping part 10, in the drawing, the not-shown end wall is arranged behind said part and separates the engine compartment located behind said wall from the passenger compartment located in front of the sound insulation element 15. In other words, the acoustic damping part 10 delimits the passenger compartment towards the front. The sound insulation element 15 serves to reduce the transmission of sound from the engine compartment into the passenger compartment. It is made of foam and essentially follows the contour of the end wall.

(10) Two plug parts 20 are arranged on the sound insulation element 15. These are arranged on the latter at an angle of about 90° with respect to the corresponding adjacent region of the sound insulation element 15 and point opposite the direction of travel of the motor vehicle.

(11) A detailed view of the driver-side, left plug part 20 is shown in FIG. 3. This is designed as a level, planar element on which a plug is arranged. The plug part 20 and plug 22 are formed integrally with the sound insulation element 15 as a foam part. The plug part 20 and the sound insulation element 15 are hinged together in a diagonally extending edge. The joint is thereby realized by the common material, the foam.

(12) The plug 22 has a planar design and in each case has a large height and width relative to its depth measured along the insertion direction. The plug 22 is designed to be inserted into a planar opening formed in the vehicle body and serves to seal or acoustically insulate the opening and fix the acoustic damping part 10 to the material forming the opening.

(13) FIG. 4 shows part of a sound-insulated vehicle body produced by means of the method according to the invention. Shown is the end wall 30, which is clad in the direction of the passenger compartment with the acoustic damping part 10 according to the invention. The acoustic damping part 10 comprises, as already shown, the sound insulation element 15 which covers the end wall 30 rearward in a planar manner, and two plug parts 20 which are laterally hinged thereto, each with a plug.

(14) On the left side of the figure, the door frame 50 of the driver's door is shown. Between the door frame 50 and the end wall 30 are vehicle body components 34, which form an opening. The latter is not shown here since it is sealed by means of the plug, likewise not shown. Only the side of the plug part 20 facing away from the plug is shown. Like the entire sound insulation element 15, this side is covered with a heavy layer 28. Other components 36 of the motor vehicle body form the door frame 50 and the lateral boundary of the engine compartment.

(15) Together with the foam, from which the plug part 20, plug and sound insulation element 15 are integrally formed, the heavy layer 28 forms the articulated connection between the plug part 20 and the sound insulation element 15. Said connection is formed in the diagonal edge analogous to what is shown in FIG. 3.

(16) FIG. 5 shows the section A-A, which is indicated in FIG. 4. It can be seen that the vehicle body components 34 form an opening 32 which is sealed by the plug 22. The plug 22 is a part of the plug part 20, which together with the sound insulation element 15 forms the acoustic damping part 10 according to the invention. As already described, the elements mentioned are integrally formed as a foam part. The heavy layer 28 is arranged flat on the inner side facing the passenger compartment. Together with an area made of foam, it forms the articulated connection between the plug part 20 and the sound insulation element 15. Said connection is formed in the portion of the foam part shown on the right and forms an angle of about 65° between said components. The sound insulation element 15 shown underneath in the illustration is located on the end wall 30, a component 36 of the motor vehicle body.

(17) Furthermore, it can be seen that the plug 22 is adapted to form an undercut 24 with the material forming the opening 32. Viewed along the insertion direction 26, the front part of the plug 22 has a greater width than the rear part of the plug 22 located in the area of the opening 32. This realizes a positive connection of the plug 22, and thus of the acoustic damping part 10, with the material forming the opening 32 in which the translational degree of freedom of the plug 22 is blocked against the insertion direction 26.

(18) As can be seen in FIG. 4, section B-B shown in FIG. 6 is aligned perpendicular to section A-A shown in FIG. 5. This in turn shows the motor vehicle body components 34 forming the opening 32, further components 36 of the motor vehicle body, and the plug 22 arranged in the opening 32 together with the associated portion of the plug part 20. An undercut 24 is also formed in this direction. Thus, the area of the plug 22 inserted through the opening 32 also extends upwards or downwards, beyond the portion of the plug 22 located in the area of the opening 32.

(19) In this illustration, it can also be seen that the plug 22 is bounded by the heavy layer 28. In the area of the vehicle body components 34 material forming the opening 32, above or below the opening 32, no foam material is arranged. These portions of the plug part 20 are formed exclusively by the heavy layer 28, which bears directly against the corresponding vehicle body components 34 in these areas.

(20) The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.